IMPORTANT:
Do not use the LUN until you configure MPIO.
Setting up MPIO
1.
Run the MPIO applet and choose the Discover Multi-paths tab.
2.
Select the
LEFTHANDP4000
disk for the Device Hardware ID.
3.
Click
Add
.
4.
Reboot the storage system when prompted.
Clustering server connections
You can cluster servers to assign multiple server connections to multiple volumes in a single
operation. Cluster existing servers or create new servers to add to the server cluster from the New
Server Cluster window. If you cluster servers that already have volumes assigned to them, all the
servers in the cluster gain access to all the volumes, and inherit the access permissions of the
original pair.
All clustered servers must have the same load balancing and volume access permission settings.
You can verify and update these settings when you create the server cluster. For information about
volume access permissions, see
“Server connection permission levels” (page 206)
. For more
information about iSCSI load balancing, see
“iSCSI load balancing” (page 233)
.
NOTE:
When using a Fibre Channel connection to a Microsoft Cluster a situation can occur
where a node that owns the witness disk in the Microsoft Cluster fails over, but does not fail back.
In this case, Microsoft failover cluster quorum is never at risk. If any additional failures occur that
require failover/failback of the witness disk to maintain failover cluster quorum, that failover
happens properly.
See the Microsoft TechNet article
http://social.technet.microsoft.com/Forums/en/
windowsserver2008r2highavailability/thread/a762606e-3f85-43a9-995b-d4fee95b08c1
for
more information.
Requirements for clustering servers
•
Minimum of two servers for a cluster
•
Same access level settings for all volumes assigned to the server cluster
•
For iSCSI: same load balancing setting for all servers
•
For Fibre Channel: one volume assigned to multiple servers in a cluster should have the same
LUN ID for each server
Creating a server cluster
1.
In the navigation window, select the Servers category.
2.
Right-click and select
New Server Cluster
.
3.
Enter a name and description (optional) for the server cluster.
4.
Do one of the following:
•
Click
Add Server
and select the server from the list of available servers that opens.
•
Click
New Server
and follow the instructions in either
“Planning server connections to
management groups” (page 198)
or
“Planning Fibre Channel server connections to
management groups” (page 201)
.
5.
Add the additional servers required for the server cluster, using either of the above methods.
6.
Optional: Next, click
Edit Server Cluster Settings
to verify that the server cluster settings are
the same for all servers and volumes.
Clustering server connections 203